C11112331312111112111133133313331333133112111113331333133313231333132212323311   >>    C1111233131211111211113313331333133313311211111333133313331323133313221232331   <<    C11112331312111112111133133313331333133112111113331333133313231333132212323313   >>      C11112331312111112111133133313331333133112111113331333133313231333132212323312   >>